Quick wheel change truck



Sept 15, 1942. R. B. co'rTRELL 2,295,550

QUICK WHEEL CHANGE TRUCK Filed Dec. 2l, 1940 2 Shleets-Sheet l INVENTOR. oberlf CoZ/e BY C@ Sept. 15, 1942.. R. B. coTTRELl. 2,295,550

QUICK WHEEL CHANGE TRUCK Filed Dec. 2l, 1940 2 Sheets-Sheet 2 @o 50 85g 60 76 g 92 ment as that described the bolster, and the insert member are specifical- "ure 1.

Patented Sept.l 1S, 1942 UNITED STATES PATE n 1 zasolsfssli#vv A.; A

Qmcx wnnnr. cmNGnrnUox Romatel! m..

Nr osi-ice signor to Chicago. lll.. a cor- Application December zi, 1940, serial No. 371,097

2a claims'. (ci. ros-197) l My invention relates to a railway car truck and more specifically to a four wheeltruck 'of the quick wheel change type wherein the bolster and side frame are so interlocked that it is a relatively simple mechanical process to release the bolster from the side frame in order to permit tlie removal of the wheels.

An object of my invention is such a `formof connection between the in a four wheel railway side frame and the bolster car truck as willnot only facilitate its assembly and dismantling but will also incorporate a novel form of ride control unit which serves as a damper for the coil springs which otherwise normally may set up damaging synchronous oscillations.

a novel form 'of interlocking arrangement between a side frame and a bolster in a quick wheel change truck comprising a novel form of interlocking member which may becountersunk in the bottom wall of the bolster and formed with arms projecting between the inboard and outboard portions of adjacent columns to serve asy .and I4 of each My invention contemplates such an arrangewherein the side frame,

shown inasmuch as the arrangement is similar at opposite ends. Figure 2 is a transverse sectional view through the truck arrangementshown in Figure lpwith y designted II the major portion of the bolster shown .in elevation, the section being taken substantially in the vertical plane bisecting the truck transverselylas indicated by the line 2-2 oi-Figure 1.

' Figure 3 is a top plan view of the truck structure shown in Figures 1 and 2, partly in section, the section being' taken substantially in the horizontal plane indicated by the line 3 3 of Fig- Figure 4 is a sectional view through the ride55 15 A denite object otmy invention is to devise lspring seat 2t novel truck arrangement in member 2, the tension ymember t, and spaced co1,-

umns l; 6, merging with said tension and come pression members to.. form'the central bolster opening 8 and spaced window openings 9, v9,

saidtension-'and compression members also mergsectional view of Figure 3. The inboard and outboard L-sections I2 column together with the top and bottom web portions of the column deii'ne respectively at it,

view oi' Figure 3.

The compression member opening may be ofgenerally sion member may .be of box-section with'` the central longitudinal reinforcing web 22 andr with, the top wall widened and formed with upstanding inboard and outboard flanges 2l and 26 dening the spring seat 2l.

Inboard of the spring yseat ,and integral with said tension member box-section may be formedy spaced lugs 30 and 32 with aligned openings u, 34 to which may be secured a tie bar extendingto a similar connection at the opposite side of the truck. Positioned on the of the tension member in said bolster opening and comprising a plurality of coil springs of relatively long travel, said springs being retained in normal relationship not only by the Aoonilnin'g flanges on the tension member but also by a top spring plate held in position as at, In by lugs-downwardly projecting from'the associated bolster -42 and interlocked therewith.

The holster 42 is of usual box-section structure including the center bearing u and the side bearing It and, as shown, isformed with aligned centralopenings` Il. 4l in the side walls-'thereof permitting associated brake rods to extend therethrough. Thel` truck structure comprises the truss type with the compression' above the bolster box-section (Figure -30 2), and beneath said bolster opening the tenv may be a spring. group` generally bolster is shown also with brake friction surface 2 beam safety support means Il in the form of a flat rod extending through certain of said aligned openings.

The bolster end, like the main body thereof. is of rectangular boxtion including the substantially horizontal top wall l2 and the bottom wall t4; On each side wall of the bolster and adjacent the upper edge thereof may be formed a bolster guide lug or pad Il, said pad extending between the legs of the adjacent column (Figure 3) and having a depth A (Figure l) slightly less than the depth B of the widest portion of the bolster opening I thereabove so that said bolster may be conveniently assembled with or dissociated from the side frame in a wheel change operation. The bottom wall is recessed upwardly centrally of the end portion and transversely thereof to receive the plate or insert member Il, the recess in the bottom of said bolster conforming to the shape of said plate lt which is formed with arcuate edges as best seen at Il, 6l in the top plan view of Figure 3. Thus, 54 of the bolster and the plate it present even bottom faces which are normally seated on the flat top spring plate ll. The plate 54 is formed with an upwardly projecting central lug lo which extends through the. bottom wall t4 of the bolster and may conveniently be keyed therein as indicated at i2. The box-section end portion of the. bolster is reinforced by the longitudinal vertical wall I4 extending therethrough, said wall being cut away as at 8C to accommodate the beforementioned lug 00. At each end of the plate 54 is formed a vertical rib tl conveniently recessed in a transverse slot 1li in the bottom wall ofthe to the adjacent friction vplate 1C. Positioning means for the rubber springs 04, I4 are formed on the opposite faces of the end portion 12 and, likewise. on the opposing faces of each friction shoe Il as may best be seen at 08, $8 in the sectional view of Figure 3.

- In assembling my novel device, the spring group may be positioned on the tension member in the spring pocket 24, the top spring plate positioned thereover, and the interlocking member 56 seated atop the spring group after which the inboard plate 1I may be placed in position at each end of the frame. the friction shoe seated thereagainst .with its associated rubber spring, and the end portion 12 of the interlocking member 58 may .be

lplaced in abutment with the nrstmentioned rubber spring. Thereafter, the additional rubber spring and shoe may be placed in position against the end portion 12 after which the upper end of the outboard plate 1I may be thrust upwardly between the inboard and outboard walls of the the bottom wall bolster and extending through the side wall thereof, thus further interlocking the plate member 56 with the bolster, and the vertical rib ll is continued into the end portion of the plate member 58, said end portion being formed as a vertical web 12 the shape of which may best be seen in the side elevation of Figure 1. Each end portion 12 projects through the rectangular opening it of the adjacent column for engagement with friction means mounted in the adjacent window opening il,-said friction means being generallyy designated 14.

Each friction means comprises inboard and outboard plates 18,1! and each of said plates is reinforced by the vertical ribs 18, 18 merging with the central hollow stud Il, mid plate presenting on its inner surface aflat friction face 82. Thebottom edge of each plate 1I may be seated as at AI4 on a ledge formed on the adjacent wall of the tension member. said plates being connned by means of spaced lugs It, Il. Also, said plates are restrained against upward movement by horizontal flanges 88, with end abutments 89, 89 against which the top edges of said plates may abut. Between the spaced friction plates 1t, 16 may be confined friction shoes 9U, Il identical in form and interlocked as at l2, I2 at their top and bottom edges by interengaglng horizontal lugs, said lugs also forming abutment means for the top and bottom edges of ythe enclosed end portion 12 and preventing relative vertical movement between the end portion 12 and the surrounding friction shoes 92, i2. Between each friction shoe l0 and the adjacent side of the end portion 12 is confined a rubber spring i4, said spring serving to urge the adjacent shoe tightly into engagement against the adjacent 82. Each friction sh Il is formed at its opposite edges with vertical :langes si, 98 which may positionsaid shoe portions with respect opening of compression member and force applied thereto sunicient to pennitthe lower end of said plate 1l to be slipped into the slot at 84 in the outer wall of the tension member.`

It will be understood that the rubber springs 84, 94 will be placed under greater or less compression or varied in composition to produce greater or less friction between theshoes and the plate 1t as may be desired.

It is to be understood that I do not wish to be limited by the exact embodiment of the device shown whichis merely by way of illustration and not limitation as various and other forms of the device will, of course, be apparent to those skilled in the art without departing from the spirit of the invention or the scope of the claims.

I claim:

1. In a railway car tru-ck, a side frame having tension and compression members, and spaced columns forming therewith a bolster opening and spaced window openings, each of said columns having in-board and outboard L-sections spaced A to denne openings therein aligned longitudinally tions adjacent the upper portions of the columns denning with said compression member a widened portion of said bolster opening of restricted depth, inboard and outboard friction plates mounted in each of said window openings, a -bolster extending into said bolster opening and having guide pads on the side walls thereof of less depth than said restricted depth at the top of said window openings and receivable therethrough for positioning between the inboard and outboard portions of said columns for abutment with said shoulders, an interlocking member having a central portion associated with said bolster and having arms extending through said aligned openings, friction shoes mounted on said arms in engagement 'with said friction plates, and a resilient pad under compression between each friction shoe and the adjacent arm.

2. In a railway car spaced columns defining therewith a bolster opening and spaced window openings, inboard and outboard friction plates on said frame adjacent each column, eachl of said columns 'comprising inboard and outboard legs defining openings therethrough aligned longitudinally of said frame, shoulders on said legs adjacent the upper of said columns defining with said compression member a widened portion of said bolster restricted depth, a spring group seated truck, a. truss side framel having tension and compression members, and

, able through the upper portion shoulders,

tral portion interlocked with said extending through said aligned openings, and

- friction shoes mounted on said arms in engagement with said friction plates.

` saidwindow opening e accanto of height less than said restricted depth insertof said bolster opening over said shoulders and umn for abutment therewith.

3. In a railway car truck, va tension and compression side frame having having inboard and outbard L'sections spaced to define openings therein aligned longitudinally than said restricted depth at the top of said.

window openings and receivable therethrough for positioning between the inboard and outboard portions ofsaid columns for abutment with said an interlocking member having a cenbolster, arms 4. In a railway car truck, a side frame comprising tension and compression' members. and spaced columns forming therewith a bolster opening and spaced window openings, said coltherethrough aligned lon- .snudinally of the fname, said bolster opening having arelatively wide upper portion of limited depth defined by shoulders on said columns, a

spring vgroup seated in said opening, a bolster extending into said opening and having guide pads on the side walls thereof of vertical depth less than said iirstmentioned depth in. said window opening and receivable therethrough,A said guide pads being normally positioned by the inboard and outboard tion shoes.

5. In .a railway car truck, a side frame comprising tension and compression members, and

spaced columns forming therewith a bolster opening andl spaced window openings. said columns having openings therethrough aligned longitudinally of the frame said bolster opening having a relatively wide upper. portion of `limited depth defined by shoulders on said.

columns, a spring group seated in said opening. a bolster extending into said opening and having guide pads on the side walls thereof of vertical mentioned depth inl depth less than said rst and receivable therethrough,

said Vguide pads being normally positioned be'-,

Y receivable he,-y i tween the shoulders on opposite legs of each colmembers, and spaced s Vcolumns forming therewith a bolster opening and i spaced 'window openings, each of said columns pads -under'compression between each end portion and the associated fric-v in said bolster opening" a bolster extendingv intov V tween inboard and outboard portions of each'V said bolster o v and seated on said spring column. an interlocking member having a cengroup, an interlocking member recessed in 'the tral portion recessed in the bottom wall of said bottom wall of said bolster, said interlocking bolsterand end portions projecting through said member having arms extending through said 5 aligned openings, inboard and outboard friction `aligned openings, 'friction shoes supported on the plates; mounted in each of said window openings ends of said arms in engagement with said plates, at opposite sides of each end portion, and fric- \tion shoes supported engagement 'with said friction plates. Y

6. In a railway car truck, a truss side frame, having .tension and compression members. and

on said end portions in ster opening of restricted depth, a spring group lent members. under compression between each 30 arm'and the associated friction shoes.

7. In a railway car truck,

trai portion recessed in the bottom wall of said bolster and seated therewith on said spring group,

said recessed member being lnterlocked with said on the`ends oi said arms in engagement with `said plates, and resilhaving inboard and in said columns outboard L-sections spaced to define openings therein aligned longitudinally of said frame, tions adjacent the upper portions of the columns dening with said compression member a widened portion of said bolster opening of restricted depth, inboard and outboard friction plates mounted in each of said window openings substantially in alignment longitudinally of said frame with the opposite edges *of said aligned openings, a bolster extending into said bolster opening with guide pads on the side walls thereof of less depth than said restricted depth at the top of said window openings and receivable therethrough for positioning between the inboard and outboard portions of said columns for abutment with said shoulders, a member recessed in the bottom wall of said bolster and extending laterally thereof through said aligned openings, and friction shoes mounted on said member and in engagement with said plates. o

10. In a railway car truck, a truss side frame havingtension and compression members, and spaced columns defining therewith a bolster opening and spaced window openings, inboard and outboard friction plates on said frame adjacent each column, each of said columns ing inboard and outboard legs denins openings therethrough aligned longitudinally of frame, shoulders on said legs adjacent the upper portions of said columns defining with said compression member a widened portion of said bolster opening of restricted depth, a spring group seated in said bolster opening, a bolster extending into rou ottm wall of said bolster and interlocked therewith at a plurality of spaced points, said interlocking member having arms extending through said aligned openings, andfriction shoes supported on the ends of said arms in engagement with said plates.

1l. In a railway car frame having tension and compression members, and spaced columns forming therewith a bolster shoulders on each of said L-seccomprisl having inboard and pression members,

truck, a truss type side opening and spaced window openings, openings in said columns aligned longitudinally of said frame, inboard and outboard friction plates fixed on said frame in each of said window openings adjacent said columns, a spring group supported on said tension member in said bolster opening, a bolster projecting into said bolster opening, an interlocking member comprising a horizontal central plate portion recessed in the bottom wall of said bolster, and vertical end portions extending through said aligned openings in the adjacent columns and between said friction plates at opposite sides thereof, said bolster and interlocking member being supported on said spring group, each of said vertical end portions supporting a plurality of friction shoes for engagement with the friction plates at opposite sides thereof.

l2. In a railway car truck, a truss type sideframe having tension and compression members,

and spaced columns forming therewith a bolster opening and spaced window openings, openings aligned longitudinally of said frame, inboard and outboard friction plates fixed on said frame in each of said window openings adjacent said columns, a spring group supported on said tension a bolster projecting into said bolst'er opening, a member having its central portion recess in the bottom wall of said bolster and seated theremember in said bolster opening, l

comprising inboard and outboard legs defining -openings therethrough aligned longitudinally of said frame, inboard and outboard friction panels on said frame adjacent each of said columns, a spring group bolster opening, a bolster extending into said bolster opening and seated on said spring group,4

an interlocking member connected to said bolster and having friction arms extending through said aligned openings. and frictibn shoes mounted on said -frictionfarms in engagement with said panels.

14. In a railway car truck, a side frame having tension and compression members, and spaced columns forming therewith a bolster opening and spaced window openings, each of said columns outboard L-sections spaced to denne openings therein aligned longitudinally of said frame, shoulders on each of said L-sections adjacent defining with said compression member a widened portion of vsaid bolster opening of restricted depth, and inboard and outboard friction plates mounted in each of said window openings substantially in alignment longitudinally of said frame. n

15. A truss side frame having tension and comand spaced columns forming therewith a bolster opening and'spaced window openings, each of said columns comprising inboard and outboard legsl of L-section defining therebetween openings in said columns aligned longitudinally of said frame, shoulders on said legs adjacent the upperportions of said columns 16. In a railway cartruck, a truss type sideframe, tension and compression members, and spaced columns forming therewith a bolster opening and spaced window openings, said columns comprising inboard and outboard legs defining openings therethrough aligned longitudinally of said frame, inboard and outboard friction panels on said frame adjacent each of saidcolumns, a bolster extending into said bolster opening, an

interlocking member connected to said bolster` and having friction arms extending through said aligned openings, and friction shoes mounted on said friction arms in engagement with said panels.

l'I. A truss side frame having tension and compression members and spaced columns forming therewith a bolster opening and spaced window openings, each of said columns comprising hinboard and outboard legs of L-section defining therebetween openings in said columns aligned longitudinally of said frame,`shoulders on said legs adjacent the upper portions of said columns defining with said icompression member a widened portion of said bolster opening of restricted group, said recessed member 'o on said tension member in said.

the upper portions of the columns guide surfaces mounted on columns forming therewith a bolster opening and spaced window openings, each of said columns A having inboard and outboard L-sections spaced to define openings therein aligned longitudinally of said frame, shoulders on each of said L-sections adjacent theupper portions of the columns dening with said compression member a widened portion of said bolster opening of restricted depth, and friction panels in each of said windows and removably mounted on said frame.

19. In a truss type, side, frame, tension and compression members, and spaced columns forming therewith a bolster opening and spaced window openings, said columns comprising inboard and outboard legs defining openings therethrough 'aligned longitudinally of said frame, and oppositely spaced inboard and outboard friction panels removably mounted on said frame in each of said windows.

20. In a railway car truck of quick wheel change type, a side frame comprising spaced col umns partly defining windows therein, aligned openings in said columns, oppositely spaced friction panels in certain of said windows mounted on said frame adjacent said columns, a bolster end in another of said windows, said end having a recess in the bottom wall thereof, a member countersunk in said recess and having arms ex tending laterally of said bolsterend through said openings, and friction shoes supported on said arms and in engagement with said panels.

21. A truss side frame having columns, a bolster opening and spaced windows, said columns having openings aligned longitudinally of said frame, and friction panels in said windows, said 'thereof and through said openings, friction E change type, a truss panels mounted on said frame adjacent said columns, and friction shoes mounted on said arms and in engagement with said panels.

24. In .a railway ycar` truck of quick wheel side frame having columns partly deningwindows therein, openings in said panels being removably mounted on said frame. 4@

22. In a railwaycar truck, a truss side frame having columns partly defining windows therein, aligned'openings in said columns, friction developing means removably mounted on said frame adjacent each of said columns, a bolster end in one of said windows and means mounted on columns, friction developing means removably mounted on said frame adjacent said columns, a bolster in one of said ,windows and having a bottom wall, a member removably countersunk in. said wall extending through said openingsand actuating said means. D 25.\In a railway car truck, a truss side frame comprising a tension member, a compression member, and columns sterI opening and spaced windows, friction de-1 veloping means in each of said windows compriaing friction panels engaged with said frame, fric tion shoes engaged with respective panels, resilient means .engaged with respective shoes, a bolster end in said bolster opening, and a member mounted on said end and connected between said openings, and actuating said friction absorbing means.

27. In a railway car truck, a side frame comprising a bolster opening, spaced inboard and outboard friction plates mounted on said frame, a friction shoe associated with each plate, a resilient member urging said shoe into engagement with said plate, resilient means in said opening,

ROBERT B. CO'I'IRELL.v

defining therewith a bol-' 

